Dust-laying device for motor vehicles



Jul 1 1924.

A. BANDELIER DUST LAYING DEVICE FOR MOTOR VEHICLES 3 Sheets-Sheet 1 Filed Feb. 10 1923 July 1. 1924. l.499,760

A. BANDELIER DUST LAYING DEVICE FOR MQTOR VEHICLES Fi led Feb. 10 1923 s Sheets-Sheet 2 Z c July 1 1924.

- 1,499,760 A. BANDELIER DUST LAYING DEVICE FOR MOTOR VEHICLES Filed Feb. 10 1923 3 Sheets-Sheet 3 1 l/VVLNTOR wwmw ATT).

Patented July 1, 1924.-

onrran DUST-LAYING nnvrcn ron Moron VEHICLES.

Application filed February 10, 1923. Serial No. 618,187.

' To all whom it may concern:

Be it known that I, ALPHONSE BANDELIER, a citizen of Switzerland, residing at Lausanne, Canton ofV-aud, in the Confederation of Switzerland have invented certain new and useful Dust-Laying Devices for Motor Vehicles, of which the following is a specification. f The object of the invention is to provide 0 a, device for preventing motor road vehicles from raising dust, by throwing atomized water on to the ground immediately about each wheel of the vehicle, which device comprises a .water reservoir connected to tubular sprinklers and means subjected to a reciprocatory movement and operated by the running of the, vehicle for maintaining the nozzles of the sprinklers constantly free from chocking. ]The device for carrying the method into practice comprises in combination a water tank connected to the sprinkling'tubes bent in- U shapeand surrounding the rear part of each wheel of the vehicle, hole cleaners which. are subjected to an alternative'movement and serving to 'maintain the orifices ofthe sprinkling tubes constantly open, a pump driven by the motor of the vehicle and serving for compressing theair contained within the water tank,a safety valve which automatically uncouples the pumpfrom the motor as soon as the pressure within the tank has attained a -predeterminedmaximum value.

vThe attached drawing'shows by way of example a working form of a device according to the invention.

Figs. '1 and 2 are respectively a side elevation and a plan view illustrating the pres ent invention attached to an automobile, the latter being shown in dotted lines. convenience of illustration, both of these figures are shown in two parts;

' Fig. 3 is a side elevation of the tank and pump drive forming a part of the improved apparatus;

,Fig. 4 is an end'view of the structure shown in Fig.3; e

Fig. 5 is aside elevation of the sprink- ,linlg device;

.ig. 6 is an'end view, partly in sect1on,of

the structure shown in Fig. 5; and v Fig. 7 is a transverse sectional View of the sprinkling tube. Y

In *the drawings the essential parts of the vehicle are indicated in dotted lines only For ' inorder to facilitatethe understanding of. the device proper.

d-IS the water tank, 6 the sprinkling tubes I bent in U shape and surrounding the rear, part" of each one of the wheels, 0" are-the o -r ca hole cleaners which are subjectedto a to andfro movement in order to maintainthe orifices of the sprinkling tubes constantly open. cZ- is the pump and e the safety valve 1 The tank a has the shape of an elongated cylinder arranged underneath the seat of the driver. Its walls are of sufiicient'thickq ness to resist the maximum interior pres sure of the tank whichpressure may 'be controlled by a manometer a disposedbn the board in front of'the drivers seat. The

tankv has a holding capacity of aboutg'60 to 80 litres and is normally filled by means of a trunk pipe 0 to. three 'quarters of-its capacitybeforeeach run of the'vehicle. 7a

is -a. valve arranged within easy reach'of thedriver and allowing the simultaneous admission of the air and water mixture into the four sprinkling pipes b. The intake tube for the mixture reaches nearly to'the bottom ofthe tank and its-free-end 'oflersa slanting edge in order to facilitate the entrance of the mixture and to prevent the r blocking ofthe intake opening by a foreign body which might occasionally get between;

and. the intake orifice the bottom of the tank of said tube. r

A' little above the steering cook the conduit connecting the tank a with the .sprinlc ling tubesb is bifurcated andris connected to'two parallel pipes at? arranged :along the beams of the vehicle structure.

The four extremities of the two. pi es a are connected by means of flexible tu es'a tothe four sprinklers 6. These lattercomprise each one a vertical portion 6 and a horizontally arranged tube 6 bent so as to form a U and carried on the lower end of-the vertical portions 6 Theselatter communicate with the two lateral arms of the tube 6 through two apertures "of a diameter of about 3 mm.. Obliquesupports 6 connect the tubes 6 firmly with the vertical portions 6 The tube 6. is per forated on the-top and on the base in eight' places which are separated one from the other by distances 'of equal length; *The' orifices I) (see Fig. 7) on the top side of the arms 6 have a diameter of 1 mmuand a needle 0 sliding-in them is given a play of 1/10@ mm- 'The orificesrat the base of the arm 6 are also 1 mm. in diameter, but the needle a sliding within them is allowed a play of about 1/3 mm. At both of its ends the tube Z; carries a wheel Z9 which bears on both sides of the tyre of the vehicle wheel so as to hold the two arms 5 of the U shaped tube 6 always in constant distance away from said wheel.

The two sprinkler tubes 72 of the front wheels are carriedby supports 6 fixedin a suitable way to the coupling rod of the direction wheels, whilst-the two sprinklers of the hind wheels are carried by bent arms Z2 fixed to the frame of the vehicle.

An orifice cleaner 0 constituted by the needle above referred to is traversing each corresponding pair of apertures-b Z). The needle 0v is carried at its top T-shaped end, working in a sliding groove 0 at the articulation of-two levers 0 Each one of these levers is pivoted on 0 upon a pin carried by a collar cfix'ed to the tube 6 and lies vertically above saidv tube. These levers constitute on both sides of the vertical portion 6 two articulated systems of five levers each. An oscillatory movement is simultaneously imparted to these two systems by means of'a'smallwheel 0 driven by the ve hicle wheel making use of any suitable intermediary means adapted to transform to rotarymotion into an alternative or to and fro'movement.

The wheel 0 is mounted upon an axle carried by an oscillating fork c hinged to a bracket '0 fixed to the vertical tube portion 6 in such a manner that the driver by hand can by means of a spring a easily bring it in and out of contact with the tyres.

It is therefore evident that when the vehicle is traveling a vertical alternating movement may be imparted to the needles 0 by bringing the wheel 0 into engagement with the vehicle wheel; The diameter of the upper holes 5 is just suflicient to permit the needles "0 to have a free sliding movement,

b utnot enough to allow a jet of mixed air and water to be forced upwardly therethrough. On the other hand the greater diameter given to the lower holes 6 at the base of "the tube 6 permits the water to escape around the needles in the shape of a fine jet. The movement of the needles prevent the base holes from becoming choked with mud or dust.

' The body of the pump d is arranged un-, derneath the tank a and its horizontal shaft is driven by means of a belt al from the ve hicle shaft whenever the belt is on the fixed pulley (P. On the one side of this fixed pulley d is arranged an idle running or loose pulley 03 onto which the belt is shifted automatically as soon as the pressure in the tank attains a predetermined maximum value under the action of the safety valve 6 which operates by the intermediary of a lever c pivoted in e and of a fork 6 The return pipe d of the pump is connected to the upper portion of the tank a.

The working manner of this device is as follows: 7

After the motor of the vehicle has been started the driver turns the valve a toward its closed position until the pressure in the interior of the tank a attains a given work ing pressure indicated by the manometer a This pressure, assisted by the vibrations of the machine, causes an intimate mixture of the air andthe water contained in the interior of the tank. If the working pressure is attained within the tank then the driver may if he wishes to prevent the road dust from being raised by-the vehicle, open the cock (L or if he does not open it, the saftey valve will automatically disconnect the pump d from the driving shaft.

Let us now presume that the uncoupling of the pump has actually taken place. If nowthe driver later on opens the cock a the pressure in the interior of the tank a will immediately go down which makes the safety valve 6 to close and consequently to again connect the pump 6 to-the driving shaft of the vehicle. 011 the other hand the pipes a, a and the vertical tube portion 6 will get filled with water and the orifice 6 within the latter will let pass just enough of it to feed the eight apertures Z2 of each sprinkler tube 6. If in this moment the wheels 0 are bearingagainst the vehicle wheels, the needles 0 aresubjected to an alternative movement and the apertures b are effectively. prevented from becoming stopped up.

In order to stop the working of the sprinkler the driver needs only to close the steering cock a When the vehicle has to travel consider able distances the driver, in order to economize his supply of water, will use the apparatus only when passing through towns or villages, or upon the most frequently travelled roads leading thereto.

Having now fully described my invention and the manner in which it is to be carried out, I declare that what I claim is:

1. Dust laying apparatus for motorvehicles, comprising a water reservoir carried by the vehicle, tubular sprinklers connected to said reservoir and having outlet nozzles adapted to sprinkler water on the ground immediately about each wheel of the vehicle, and reciprocatory means operated by the wheels of the vehicle for maintaining the nozzles of said sprinklers free from choking.

2. Dust laying apparatus for "motor vehicles, comprising, in combination, a water reservoir carried by the vehicle, tubular sprinklers connected to said reservoir and having outlet nozzles, said sprinklers being disposed in the form of a U embracing the rear part of each wheel of the vehicle, a

pump driven by the engine of the vehicle 5 for compressing the air within the reservoir,

a safety valve adapted to automatically disengage the pump from the motor when the pressure within the reservoir reaches a predetermined limit, and reciprocatory means operated by the wheels of the vehicle for 10 maintaining the nozzles of said sprinklers free from choking.

In testimony whereof I have afiixed my signature in presence of two Witnesses.

ALPHONSE BANDELIER. Witnesses:

M. CHAPMAN, R. ESSELLIER. 

